Dipper tooth structure



May 3, 1932. P. T. ROBIN 1,355,930

DIPPER TOOTH STRUCTURE Filed Dec. 16, 1929 I N V EN TOR.

7 BY A TTORNEYS,

Patented May 3, 1932 ETED STATES PATENT" U FFIE PHILIP T. ROBIN, OFERIE, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

THE WELLMAN ENGINEERING- COMPANY, OF CLEVELAND, OHIO, A CORPORATION OFOHIO DIPPER TOOTH STRUCTURE Application filed December 16, 1929. SerialNo. 414,305.

The present invention is directed to simplifying and making more ruggedthe dipper tooth conections between the detachable dipper teeth andtheir bases. These teeth are subjected to very severe strains and theconnections must be rugged enough to sustain this strain. Features anddetails of the invention will appear from the specification and claims.

A preferred embodiment of the invention is illustrated in theaccompanying drawings as follows Fig. 1 shows a section on the line 11in Fig. 2.

Fig. 2 a side elevation of the structure.

Fig. 3 a section on the line 3-3 in Fig. 1.

Fig. 4 a plan view of the key plug.

1 marks the tooth base which is secured to the lip 1a of a dipper 1b inthe usual manner. The base has a tongue, or projection 2, preferablytapered to conform to the taper of the ordinary dipper tooth.

The dipper tooth 3 has the forward point and is provided with a socket 4which is adapted to receive the tongue 2.

A bolt 5 extends through an opening 6 in the tongue 2, the opening 6being preferably larger than the bolt. The walls of the socket .4 areprovided with openings 7 somewhat larger than the opening 6 butconcentric therewith and sockets 8 are provided in the faces of thetongue 2 of the same size as the openings 7 and registering therewith.

Key plugs 9 are placed in the openings 7 and extend into the sockets 8.The bolt 5 extends through openings 9a in the key plugs, a head 10 and anut 11 being housed in the openings 7, the plugs terminating far enoughfrom the outer surfaces of the tooth to provide the housing space.

lVith this structure the violent strains on the tooth are sustained bythe key plugs and the bolt is relieved of the direct shearing strainsand only operates to hold the key plugs in place. The walls of theopening 6 being larger than the bolt, the bolt is out of contact withthe walls of the opening. The ends of the bolt are properly housed so asto prevent injury to the bolt. 1

It will be noted that the bolt 5 is arranged approximately in the centerof the proj ecting tongue and the engaged surfaces of the tooth. lViththis arrangement the strains on the tooth which tend to move the tongueare sustained by the tongue surfaces engaging the surfaces of the wallsof the socket and the plugs are thus very largely relieved of the moresevere strains to which the teeth are subjected.

While I have termed this a dipper tooth, it will be understood that itis my intention to give to the word dipper a wide enough meaning toinclude such implements as are ordinarily termed drag line buckets,clamshell buckets and the like.

What is claimed as new is 1. The combination of a dipper tooth base; adetachable tooth on said base, said base and tooth having a tongue andsocket connection, the outer member of the connection having a key plugreceiving opening and. the inner member of the connection having a keyplug receiving socket; a key plug in the opening extending into the keyplug receiving socket locking the tooth on the base, said key plug beinginsertable into the opening and from the opening into the socket; and abolt extending through the members of the connection locking the keyplug in place.

2. The combination of a a detachable tooth on said base, said base andtooth having a tongue and socket connection, the outer member of theconnection having a key plug receiving opening and the inner member ofthe connection having a key plug receiving socket; a key plug in theopening extendin into the key plug receiving socket locking the toothon. the base, said key plug being insertable into the opening. and fromthe opening into the socket; and a bolt extending through the members ofthe connection locking the key plug in place, the opening forming ahousing for the end of the bolt.

3. The combination of a dipper tooth base; a detachable tooth on saidbase, said base and tooth having a tongue and socket connection, theouter member of the connection having key plug receiving openings andthe inner member of the connection having key plug receiving sockets;plugs in the openings eX- dipper tooth base;

tending into the key plug receiving sockets locking the tooth on thebase, said key plug being insertable into the opening and from theopening into the socket; and a bolt extending through the members andthe key plugs locking the plugs in place.

4. The combination of a dipper tooth base a detachable tooth on saidbase, said base and tooth having a tongue and socket connection, theouter member of the connection having key plug receiving openings andthe inner member of the connection having key plug receiving sockets;plugs in the openings extending into the key plug receiving socketslooking the tooth on the base, said key plug being insertable into theopening and from the opening into the socket; and a bolt extendingthrough the members and the key plugs locking the plugs in place, theopenings forming housings for the ends of the bolt.

5. The combination of a base having. a tooth-receiving tongue extendingtherefrom, said tongue having an opening therethrough and a key plugreceiving socket; a tooth having a tongue-receiving socket, said toothhaving a key plug receiving opening registering with the plug recelvlngsocket; a plug in the opening extending into the socket,'said plug beinginsertable through the opening and from the opening into the socket; anda bolt extending through the plug and opening in the tongue locking thekey plug in place.

6. The combination of a base having a tooth-receiving tongue extendingtherefrom, said tongue having an opening therethrough and a key plugreceiving socket; a tooth having a tongue-receiving socket, said toothhaving a key plug receiving opening registering with the plug receivingsocket; a plug in the opening extending into the socket, said plug beinginsertable through the opening and from the opening into the socket; anda bolt extending through the plug and opening in the tongue locking thekey plug in place, the opening in the tooth forming a housing for theend of the bolt.

7. The combination of a base. having a tooth-receiving tongue extendingtherefrom, said tongue having an opening therethrough and key plugreceiving sockets at the ends of the opening; a tooth having a tonguereceiving socket, said tooth having key plug receiving openingsregistering with the key plug receiving sockets; a plug in the openingextending into the socket, said plugbeing insertable through the openingand from the opening into the socket; and a bolt extending through theplugs and the opening in the tongue lockin the key plugs in place.

8. The combination of a base havmg a tooth-receiving tongue extendingtherefrom, said tongue having an opening therethrough and keyplugreceiving sockets at the ends of the opening; a toothhavinga tonguereceiving socket, said tooth having key plug" receiving openingsregistering with the key plug receiving sockets; a plug in the openingextending into the socket, said plug being insertable through theopening and -from the opening into the socket; and a bolt extending:through the plugs and the openingin the tongue locking the key plugs inplace, the openings forming housings for the ends of the bolt.

In testimony whereof I have hereunto set my hand.

PHILIP T. ROBIN.

